Why has my 3g turned of on my Lumia 925?

[WPCentral Question]

lumia 925 turn off 3g

turn off 3G

 

[broughshane]

Re: lumia 925 turn off 3g

Setting > mobile + sim > sim setting and then highest connecting speed . your phone will still go between 3g and 4g but will choose 4g as it main carrier signals of choice.